| (19) |
 |
|
(11) |
EP 0 293 642 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
27.09.1989 Bulletin 1989/39 |
| (43) |
Date of publication A2: |
|
07.12.1988 Bulletin 1988/49 |
| (22) |
Date of filing: 09.05.1988 |
|
|
| (84) |
Designated Contracting States: |
|
DE ES FR GB IT |
| (30) |
Priority: |
15.05.1987 US 49891
|
| (71) |
Applicant: NALCO CHEMICAL COMPANY |
|
Naperville
Illinois 60563-1198 (US) |
|
| (72) |
Inventors: |
|
- Fong, Dodd Wing
Naperille
Illinois 60565 (US)
- Diep, Daniel V.
Aurora
Illinois 60505 (US)
|
| (74) |
Representative: Rotter, Ulrich, Dipl.-Chem. Dr. et al |
|
Patentanwälte
Dipl.-Ing. Olaf Ruschke
Dipl.-Ing. Hans E. Ruschke
Dipl.-Ing. Jürgen Rost
Dipl.-Chem. Dr. U. Rotter
Pienzenauerstrasse 2
81679 München
81679 München (DE) |
|
| |
|
| (54) |
Pumpable magnesium hydroxide slurries |
(57) An aqueous 50% or higher by weight magnesium hydroxide slurry having a reduced Brookfield
viscosity which contains from 0.1-5% by weight based on the weight of said slurry
of a sulfomethylated polyacrylamide having from 2-30 mole percent of sulfomethyl groups
and having a molecular weight of from 5,000-30,000.